
Calamansi purée is a pulped citrus product made from calamansi, a small, highly acidic mandarin-kumquat hybrid, used as a souring and flavouring ingredient.
Sharply sour, with lime-like acidity carried over a fragrant mandarin-orange aroma; low in bitterness and only faintly sweet.
A small measure sours and perfumes a build at once, shaken in like other tart citrus; larger doses make its hybrid aroma the featured citrus note. Commercially sold purées may be sweetened or stabilised, shifting the sugar-acid balance, so added sweetener is adjusted accordingly.
For a simple souring accent, lime or another tart citrus juice matches the high acidity, with any sweetness rebalanced by syrup; where the calamansi flavour is the feature, no single citrus reproduces its combined lime-tartness and mandarin-orange fragrance, though blending lime with a little mandarin approximates it.
Calamansi is a mandarin-kumquat hybrid with a sweeter, more orange-tinged aroma over its acidity, whereas lime is a distinct citrus with a sharper, more purely tart and characteristically limey aroma; they fill the same souring role but are not aromatically identical.
Produced by pulping or juicing the whole or seeded fruit, it carries the calamansi's acidic juice together with pulp and body rather than being a clarified juice. The fruit itself is a citrus hybrid, generally regarded as a cross between a mandarin orange and a kumquat, small and round with a thin, edible rind.
Perishable once opened; its bright citrus aroma fades with heat and time, so keep it refrigerated and use promptly.
Calamansi is native to and most strongly associated with the Philippines and tropical Southeast Asia, where it is a widely used culinary souring agent.